Sanding machine



May 31, 1932. G. A. SCHIPPER SANDING MACHINE 3 Sheets-Sheet` 1 Filed July 2@ 1928 Il., max. n. N MN "W i. 1; fkrrxf. w www., 12 il? EL@ .z www.. --WUOHMIN, h

INVENTOR.

BY I

A TTORNE Y.

May 31, 1932. G, A. SCHIPPER 1,860,905

SANDING MACHINE Filed July l 25. 1928 3SheetSSheet 2 3o :L4 l e@ 5@ 4% 1 a; A 54a "a Y g3 4`41 44 se 35 37 42 g. ,l Wx

INIfENTOR.

ATTORNEY.

May 31, 1932. G. AA SCHIPPER SANDING MACHINE Filed July 25, 1928 3 Sheets-Sheet 5 INVENTOR.

ATTORNEY.

Patented May 31, 17932 GEORGE A. SCHIPPER,

or AURORA, INDIANA sANnING MACHINE Application led July vS25,`

My invention relates to improvementsin machines for sanding round wood turnings such as chair and table legs, spindles, etc. The principal object of my invention '1s to provide a sanding'machine of simple construction, quiet in operation and requiring a minimum of motive power for'the accomplishment of the sanding operations.

A further object of the invention is to provide in a sanding machine means whereby the work may be inserted into and removed from the machine at intervals when the work spindles have stopped, thus eliminating danger to the operator and loss through the breakage of work.

Another object of the invention is to provide in a sanding machine co-acting brushes and work spindles so designed that the workv will be equally well sanded throughout, in-

stead of producing an irregular finish by the flexible portions of the brush tending to follow the grooves of the work and thus failing properly to finish the higher surface of the turning.

' thereof.

Further objects of the invention will appear from the following detailed description the abrading brush reciprocating mechanism.

The numeral 1 indicates a bed or frame of the machine, said bed being supported on standards 2. Mounted in bearings carried by end brackets 3 and 4 supported on the bed 1 is an oscillating shaft 5. Secured to the oscillating shaft 5 are tivo arms Gand 7 carrying bearings 8 and 9 on opposite sides of the shaft 5. The arms 6 and 7 are so spaced on the shaft 5 as to provide room for pulleys 9-a and 10 which are mounted be- 1928.` Serial No. 295,247.

tween said arms on the work spindles 11 and 12. between thearms 6 and 7 is an idler pulley `13. Slidably mounted upon ythe shaft 5 are tail stocks 14 and 15 carrying spindles 1 6 and 17 in alignmentV respectively'with the work spindles 11 and 12. The tail stocks 14 and are' carried by an arm 18 on a collar 19 through which a set screw 20 bears in a groove 21 in the shaft 5. The tail stock'spindles 16 and 17 are moved longitudinally in the heads by means of levers 22agains`t compression springs 23 carried by the heads, said Rotatably mounted on the shaft 5 also mechanism being of familiarv construction Y and adapted to permit the feeding of the work between the work spindlesV 1112 and the tail stock spindles 16-17 respectively.v

In a bearing in the end plate of the Vbed 1 is a shaft 24 to which a main drive pulley 25 is rigidly secured.` Inside the bed 1 the shaft 24 is provided with a pulley 26 in the same vertical plane with the pulleys Q-c, 10 and 13. Rotatably mounted on a shaft 27 in the upper portion of the braoketB-isV a pulley 28.

An adjustable idler pulley 29 isymounted on a bracket 30 at the rear of the bed 1.v The pulleys 28 and 29 are in the same vertical plane as pulley 26. Al belt 31 driven bythe pulley 26 `passes around' the pulleys 28'and 29, and is arranged to drive alternately the pulleysV 9-a and 10, riding, during the intermediate position of both of said pulleys, upon thepulley 13. v

The shaft 5 is oscillatedy so as alternately to bring the pulleys Q-a'and 10 into driven contact with the belt 31 by means of a crank 32 secured on theouter end of shaft 5. The crank 32 is operated by means of al link 33 the lower end of which is pivotally'secured at 34to one point of a star wheel 35. f The wheel 35 is driven by rollers 36 carried by ai plate 37 rigidly secured on a shaft 38 journaled plate 37. The outer end of the shaft 28 is provided with a bevel gear 40 rigidly secured thereto, said gear being in mesh with a bevel vpinion 41 securely mounted on a cross shaft 42 mounted in bearings 43 carried by the standards 2. The other end of the shaft 42 is provided with a worm wheel 44 driven by a worm 45 oarriedby a Astud shaft 46 mounted in bracket bearings 47 carried by the frame. The outer end of the stud shaft 46 is provided with a pulley 48 rigidly ysecured thereto, said pulley being driven by a beltr 49 fr-om the pulley 50 on the outer end of drive shaft 24.

Adjustably mounted on the standards 2 are two high arms 51 the lower ends of said arms being slotted to provide slidable adjustment forwardlyand rearwardly on the standards 2and arranged to be secured on the standards by bolts and nuts 52. The-upper ends of the arms 51 support a longitudinal rod 53 on which slidable heads 54 are mounted. Pivotally mounted on the heads 54 are links 55 which in turn carry short'links 56 the latter being pivotally secured thereto and pivotally supporting frames 57-57, having bearings`58-58 and 59-59 for shafts 60 and 61. The upper shaft 60 carries a pair of'arms 62 and the lower shaft 61 carries a pair of arms 63 between which the brush carrying rods 64 are mounted, there being two of such rods carried by the arms of each of the shafts 60 and 61 as clearly shown in Figure 4 of ther drawings. rIhe rods 64 are tubular and slotted to provide for securing arcuate shanks 65 of the brushes 66 by means of bolts 67, the brushes being also adjustable longitudinally on the rods. The usual slitted sand paper 68 is secured over the brushes by means of clamping members 69 carried by the arms 62, and extending along the rods.k The pairs of brushes carried by the arms 62 and 63 are adapted to bear alternately on the respective work carried between spindles 11-16 and 12-17 as hereinafter set forth, the arms 62 and 63 being oscillated intoand out of working position at the proper intervals by means of a crank 70 secured on the upper shaft 60, said crank being operated by a link 71 pivotally secured to a crank 72 carried by a sprocket wheel 73 which is driven by a sprocket chain 74 from a sprocket pinion 75 secured on the shaft 38. The shaft 60 carries a segmental gear 76 which is in mesh with a similar gear 77 secured on the lower shaft 61. It will thus be seen that when the upper shaft 60 is rocked by the crank 70 the lower shaft 61will be rocked in the opposite direction by the segmental gears. given to thel frames 57-57 and the brush mechanism carried thereby, in the longitudinal direction of the machine by means of a bar 78 extending downwardly from one of the frames 57, the lower end of said bar being rigidly secured to a horizontal bar 79, see Figures 1 and 6 of the drawings. The other Oscillating motion isvv end of the bar 7 9 is forked to bear slidably Y on the shaft 42, and carries a roller 80, adapted to ride upon a cam 81 Vmounted on the shaft. A tension spring 82 between the bar 78 and the frame holds the roller upon the cam. As will be seen, rotation ofthe shaft rlhe operation of the machine is as follow s;

In the position shown in Figure 1 the upper operating work spindle 11 and tail spindle 16 are out of operating position, and ready to receive a spindle or other piece of work to besanded. TheA operator inserts the spindle betweenthe spindles 11 and 16 by withdrawing the spindle 16k by means of the lever 22 and then releasing the lever to clamp the spindle. The machine being in operation the shaft 5 and spindle mechanisms are rocked intermittently by mea-ns of the star wheel 35,' link 33 and crank 32, the power being delivered to the star wheel from the drive shaft 24 by, means lof the belt 49, pulley 48, worm gear 44, shaft 42, bevel gears 41 and 40 and roller carrying plate 37 so as next to bring theV pulleyy 9-a against the belt 31 in which positionthe spindle to be operated on is in position to contact with the sand brushes. Simultaneously the related brush mechanism is oscillated so jas `to bea-r upon the spindle by means of the crank 70, etc., and the other brushes carried away from their related spindle by means of the segmental gears. While the upper spindle is thus being carried into operating position, the lower spindle having completedits work is carried out of operating position, and the pulley 10 is braked against the strap 83 so as to stop its rotation. The sanded spindle is then removed and a new one inserted. Vhile the respective spin-A dles are being operated on they are held positively during the required interval by reason of the locking sections 86-86 of Ythe star wheel bearing positively against the circumference of the cam wheel 87 on the shaft 38; this interval ralso allowing the operator to remove the completed spindle and to inserta new spindle to be sanded in the Vidle work spindles. During the entire operation of the machine also, the sand brushes are being oscillated longitudinally on f the work by means of the cam 81 and related mechanism.

lt will be understood, of course, that the timing of the various operations, that is the oscillating of the work spindles and brushes, is such as to permit a spindle to be fully opersoV the brushes are so related With respect to the work by means of adjusting the vertical frames l that as the spindle to be operated upon and brushes approach each other the spindle is brought progressively into contact with the brushes. Adjustments may be made for different diameter spindles by adjustment of the standards 5l, and also by adjusting the limit of movement of the Work spindles by moving the upper end of the link 33 in the slot 88 of the crank 32 Which oscillates the spindle.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a sanding machine in combination With a shaft, Work spindles mounted on said shaft and carried on opposite sides thereof, means for oscillating said shaft so as to bring said Work spindles alternately in operative position and means for rotating each spindle While in such operating position, a frame, a pair of shafts mounted in said frame, each of said shafts being provided With sanding brushes, the brushes on each shaft being arranged to operate upon Work carried by one of said Work spindles, and means for oscillating said shafts so as to cause the respective brushes successively to contact With the Work carried by the respective Work spindles when in operative position.

2. In a sanding machine in combination With a shaft, Work spindles mounted on said shaft and carried on opposite sides thereof, means for oscillating said shaft so as to bring said Work spindles alternately in an operative position and means for rotating each spindle While` in such operating position, a

' frame, a pair of shafts mounted in said frame,

each of said shafts being provided With sanding brushes, the brushes on each shaft being arranged to operate upon Work carried by one of said Work spindles, means for oscillating said shafts so as to cause the respective brushes successively to contact With the Work carried by the respective Work spindles when in operative position, and means for locking the Work spindles against oscillation during desired intervals.

3. In a sanding machine in combination with a shaft, Work spindles mounted on said shaft-and carried on opposite sides thereof, means for oscillating said shaft so as to bring 35 said Work spindles alternately in anV operative position and means for rotating each spindle While in such operating position, a frame, a pair of shafts mounted in said frame, each of said shafts being provided With sanding brushes, the brushes on each shaft being arranged to operate upon Work carried by one of said Work spindles, means for oscillating said shafts so as to cause the respective brushes successively to contact With the Work carried by the respective Work spindles when in Voperative '-postion, and rmeans for oscillating the sanding brushes longitudinally of the spindle during operation;

` 4E. In a sanding machine in combination With a shaft, Work spindles mountedion 'said yshaft and carried on opposite sidesthereof, means for oscillating said shaftso asto bring 'said Work spindles alternatelyin an operative position and means for rotating each spindle While in such `operating,position7 a frame, a pair of shafts mounted in said frame, each of said shafts being provided with sanding brushes, the brushes oneach .shaft being are ranged to operate upon workcarried by one `of said Work spindles, means for oscillating said shafts so las. to cause Vthe respective brushes successively tocontact with the Work carried by the respective Work spindles when inoperative position,means `for locking` the Work spindles against oscillation during desired intervals and means for oscillating the sanding brushes longitudinally of. the spindle during operation. 2 y' Y 5. In a sanding machine in combination, a shaft, Work spindles mounted on said shaft `and carried on opposite sides thereof, means for oscillating said shaft so as to bring said Work spindles alternately in an operative position, a pulley for the operation of each of `saidmvork spindles, a continuous fbeltn` ar- ;.rang'ed to contact and drive each of said pulleys when the spindle is inoperative position, an idler pulley mounted on said shaft and arranged to carry said belt during the oscillation of said shaft, a frame, a pair of shafts mounted in said frame, each of said shafts being.` provided with sanding brushes,` the brushes on each shaft beingarranged to operate upon Workcarried by one of said Work spindles,.and means for oscillating'said shafts so as to cause the-respective brushessuccessively to contact with the -Work carried by the respective Work `spindles when in operative position. .n i

6. In a sanding machine in combination, a shaft, Work spindles mounted on said shaft and carried on opposite'side's thereof, means for oscillating said shaft soas to ybring said being provided Withsanding brushes, fthe 'e brushes on each shaft beingarranged to operate uponv Work carried by` one of said, Work spindles, means for oscillating saidshafts so as to cause the respective brushes successively to contact With the Work carried by the respective Work spindles when in operative position, and means for locking the Work spindles against oscillation during desired intervals.

7. In afsandingmachine in combination, a shaft,`w ork spindles mounted on said shaft and carried on opposite sides thereof, means for voscillating said shaft so as to bring said Work spindles alternatelyin an operative position, a pulley for the operation of each of said Work spindles, a continuous belt arranged to Contact and drive each of said pulleys `When the spindle is in operative position, an idler pulley mounted on said shaft and arranged to carry said belt during-the oscillation of said shaft, a frame, a pair of shafts mounted 4in said frame, each of said shafts being provided With sanding brushes, the brushes on each shaft being arranged to operate upon :Work carried by one of said' Work spindles,

meansfor oscillating said shafts so as to cause the respective brushes successively to contact with the Work carried by the respective Work spindles when in operative position, and means for oscillating the sanding brushes longitudinally of the spindle during operation.

8. In a sanding machine in combination, a

shaft, vvork spindles mounted on said shaft and carried on opposite sides thereof, means. i for oscillating said shaft so as to'bring said lWork spindles alternately in an operative position, apulley for the operation of each ofsaid Work spindles, a continuousbelt arranged to contact and drive each of said pulleys When the spindle is in operative position, an idler pulley-mounted on said shaft and arranged to carry said belt during the oscillation of said shaft, a frame, a pair of shafts mounted in said frame, each of said shafts being provided With sanding brushes,- the brusheson each shaft being arranged to operate upon Work carried by one of said Work spindles, means for oscillating said shafts so as to cause the respective brushes successively to contact With the Work carried by the respective Work spindles when in operative position, means for locking the work spindles against oscillation during desired intervals, and means for oscillating the sanding brushes longitudinally of the spindle during operation.4 i

9. In a sanding machine in combination with pivotally suspended sanding brushes, a

' shaft, Work spindles mounted on said shaft and carried on opposite sides thereof, means for oscillating said shaft so as to bring said Work spindles alternately in operative position, means for rotating veach spindle While in such operative position, and means for oscillatingA said brushes on their pivotal mountings longitudinally of the respective Work spindles. Y GEORGEA. SCHIPPER. n 

